OTRC: Chris Hemsworth: Filming 'Avengers' was 'a hell of a lot of fun'

Chris Hemsworth and Chris Evans climb back into their comic book hero uniforms as Thor and Captain America for "The Avengers." The actors opened up recently to OnTheRedCarpet.com about the joys and "nerve-wracking" moments behind shooting the blockbuster film.

"I think Joss [Whedon, the director] has read every comic book ever written so there's... he's certainly able to pull from that and orchestrate this mad team," Hemsworth told OnTheRedCarpet.com's George Pennacchio on April 21. "But it was a hell of a lot of fun."

"Often it's pretty hard to watch something you've shot. You're too close to it," he added. "Whereas this I got swept right away and had a hell of a time."

"The Avengers" features characters from the "Iron Man," "Thor," "The Incredible Hulk" and "Captain America" together. Scarlett Johansson reprises her role as Natasha Romanoff / Black Widow from "Iron Man 2" while Robert Downey Jr. returns as Tony Stark / Iron Man. Jeremy Renner plays Clint Barton / Hawkeye and Samuel L. Jackson will reprise his role as Nick Fury. The film also stars Colbie Smulders of "How I Met Your Mother" as Maria Hill, a S.H.I.E.L.D. agent who works closely with Nick Fury.

Fury calls on the heroes to assemble as The Avengers to fight Tom Hiddleston's character Loki, a villain from "Thor" who wants to rule over the human race.

Chris Evans explained that the action-packed film's CGI sequences presented some hurtles for the actors and Whedon during filming.

"You get to the final battle of the script and you got 10, 20 pages of just direction. No dialogue. Just 'He jumps through the window and Hulk rips this and this thing flies down,'" Evans said. "It's nerve-wracking. You're spectator, like the audience."

"The first time I saw it in a theater, I didn't know what to expect," Evans added. "So you kind of just, you pray."

Whedon is perhaps best known for creating the television series "Buffy the Vampire Slayer" and the short lived but beloved series "Firefly." Whedon also created "Dollhouse" and "Angel" and co-wrote and directed the popular online musical "Dr. Horrible's Sing-Along Blog" in 2008. Whedon wrote the script and directed "The Avengers" as well.

The green screen figures weren't the only problems the actors had. Apparently the super hero hair was a problem as well. Evans, who now sports a buzz cut, is seen in the film with a longer hairstyle as Captain America while Hemsworth blonde shoulder-length hair in the movie.

"I kept wanting to touch it and every time you'd touch it the make-up artist would come in and scream at you, 'Don't touch your hair,'" Evans said. "Joss had a very specific idea about the way he wanted it to look."

"The Avengers" hit theaters on May 4. Check out the trailer for the film below.

Reporting by George Pennacchio of KABC Television, parent company of OnTheRedCarpet.com that also produces the entertainment show "On The Red Carpet"(check for local TV listings).